# Work done by the gas during the -

satishinamdar
Work done by the gas during the ---

Sir,
My son has tried to solve this problem,He is not able to get the answer.Can you please help me to help my son in solving the problem?

Consider the cyclic process ABCA, shown in the fig.performed on a sample of 2.0 mole of an ideal gas.A total of 1200J of heat is withdrawn from the sample in the process.Find the work done by the gas during the part BC.

i c.
i .b
i .
i .
i .
i......
o
unable to draw graph. Think of a straight line from pt.c downward on line ob it meets the line at pt.a
there is a curved line bc.sinking downward.

can you pl help?(also let me know how to drw diagrams or graphs )
Regards

Staff Emeritus
Gold Member
Welcome to PF satishinamdar, We have a section of the forums dedicated to homework and coursework questions. Could you show us what you/your son has attempted thus far? Any working / thoughts? Is the graph a pressure volume curve? If so, the work done is the area encolsed by the curve.

~H

satishinamdar
Work done by gas

Sir,
The attempt made was as follows
the given graph is a t-v graph
the work done during CA is 0 as the volume is constant
therefore work done during the process AB minus work done during the process CB =loss of heat
as the process is cyclic the change in the internal energy is 0
AB is straight line from origin hence press is const
calculating pressure and volume at A as follows
0.00224m^3 occupy 1 mol of gas at stp and then relating it at 2 mol and 300k and 500k...
work done at AB is w=p(v2-v1).
but the answers are not matching ans given in the textbook is (-4520joules)
kindly let me know if i am in the right direction
Warm Regards
-tejas inamdar

satishinamdar
Work done graph

I have attached the graph now.
tejas inamdar

Last edited by a moderator:
satishinamdar
Dear Sir,
Kindly help in solving this .
Regards

Homework Helper
Gold Member
Your graph isn't attached. I can't see it.

satishinamdar
Work done by gas

jpg .word file attached.

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